More explicitly validate the response status
More explicitly validate the response status

Explicitly check for 100 <= status < 400, and treat other status values
(including non-numeric status values) as an error.

cscott/restbase,milimetric/restbase,eevans/restbase,wikimedia/mediawiki-services-restbase,Pchelolo/restbase,gwicke/restbase,d00rman/restbase,cscott/restbase,wikimedia/restbase,Pchelolo/restbase,milimetric/restbase,d00rman/restbase,inverno/restbase,inverno/restbase,wikimedia/hyperswitch,gwicke/restbase,eevans/restbase,wikimedia/restbase,wikimedia/mediawiki-services-restbase